Sunlite, 4 watt incandescent medium based T1 tubular bulb works with most 12 volt lighting fixtures, will provide 26 lumens of light output, and will last for an average of 1.1 years. This bulb features a clear finish that provides a bright, crisp light. Incandescent lighting is commonly used for decorative, office, residential, commercial and special purpose lamps. These bulbs are also great for decorative and special purpose lighting applications.